In ultrasound diagnosis of, for example, the breasts, a microstructure extraction image in which a microstructure is actively extracted is generated by performing MIP processing together with CFAR processing of removing speckle patterns from a B mode image (tissue image). The generated microstructure extraction image is displayed in the dual display form or the triplex display form, together with, for example, a B mode image before CFAR processing or a B mode image after CFAR processing.
